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Use either 5W or 10W-
Posted by Dick in Falls Church [Email] (more from Dick in Falls Church) on Sat, 31 Dec 2005 09:48:02
In Reply to: thanks, more info, steve, Thu, 29 Dec 2005 14:13:35
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I doubt you'd be able to tell any difference unless it drops well below 0 F.
GM stopped recommending xW-40 oil quite a few years ago. Their studies showed that the viscosity index improvers in use at the time tended to shear, and leave deposits in the ring area. There are non-shear VI improvers available, but I suspect most of the oil producers tend to stay away from them, since they cost more.
Personally, I haven't used anything but synthetic in any of my cars for over 27 years now.
posted by 71.252....
Posts in this Thread:
- oil question, not Saab specific, steve, Thu, 29 Dec 2005 11:37:46
- thanks, more info, steve, Thu, 29 Dec 2005 14:13:35
- Re: oil question, not Saab specific, Dean, Thu, 29 Dec 2005 13:24:15
- Re: oil question, not Saab specific, LesH, Thu, 29 Dec 2005 12:27:21
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